How to determine a radio wave's frequency from electrical signal?

If I send an electrical signal through an antenna and create radio waves, how do I know the frequency of the wave that's been made? Can I figure it out from the voltage of the electrical signal, or do I need to measure the wave after it's been emitted?

4 Answers

  • 1 year ago
    Favorite Answer

    Spectrum analyzer is the only thing I know. Some frequency counters go to VHF frequencies.

    Yea, look at the period of the signal with an Oscope and calculate frequency.

  • 1 year ago

    Use a scope or frequency counter to determine the frequency.

  • Zirp
    Lv 7
    1 year ago

    the frequency of the wave is the frequency of the alternating current.

    Voltage is irrelevant

  • 1 year ago

    You would need to know the carrier frequency before hand. An electrical signal will be modulated before it gets transmitted. When the signal reaches the receivers it get demodulated back to a electrical signal.

    Just like a radio station. You will need to know what frequency it uses and then tune the radio to the correct frequency. Otherwise you will get static noise.

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